It would come quite handy to see the source of a page. Calling notepad would already be fine, just so that you can analyze (or copy) the source of a page.
Should be possible without a lot of bloat.
Wouldn't it be possible just to copy Mozilla's view-source code? I always like having colour highliting, which Notepad can't really offer. In a pinch, though, Notepad'd be fine.
Having it launch your preferred HTML editor as set in Internet Options would be best, so i could click on `View Source` and it would fire up my HTML editor on my machine. (that being Dreamweaver)